diff --git a/setup.py b/setup.py
index 5a29b73e1..eb541ff24 100755
--- a/setup.py
+++ b/setup.py
@@ -5,6 +5,7 @@
 import sys
 import subprocess
 import textwrap
+import warnings
 from functools import partial
 from distutils.sysconfig import get_python_inc